Diverticulitis

Topic Overview

Illustration of the lower digestive system

What is diverticulitis?

Diverticulitis happens when pouches (diverticula Click here to see an illustration.) form in the wall of the colon Click here to see an illustration. and then get inflamed or infected.

What causes diverticulitis?

Doctors aren't sure what causes diverticulitis. But they think that a low-fiber diet may play a role. Without fiber to add bulk to the stool, the colon has to work harder than normal to push the stool forward. The pressure from this may cause pouches to form in weak spots along the colon.

Diverticulitis happens when bacteria get trapped in the pouches. This can lead to inflammation or infection.

What are the symptoms?

Symptoms of diverticulitis may last from a few hours to a week or more. Symptoms include:

  • Belly pain, usually in the lower left side, that is sometimes worse when you move. This is the most common symptom.
  • Fever and chills.
  • Bloating and gas.
  • Diarrhea or constipation.
  • Nausea and sometimes vomiting.
  • Not feeling like eating.

How is diverticulitis diagnosed?

Your doctor will ask about your symptoms and will examine you. He or she may do tests to see if you have an infection or to make sure that you don't have other problems. Tests may include:

How is it treated?

The treatment you need depends on how bad your symptoms are and whether you have an infection. You may need to have only liquids at first, and then return to solid food when you start feeling better.

If you have an infection, your doctor may prescribe antibiotics. Take them as directed. Do not stop taking them just because you feel better.

For mild cramps and belly pain:

  • Use a heating pad, set on low, on your belly.
  • Relax. For example, try meditation or slow, deep breathing in a quiet room.
  • Take medicine, such as acetaminophen (Tylenol, for example).

You may need surgery only if diverticulitis doesn't get better with other treatment, or if you have problems such as long-lasting (chronic) pain, a bowel obstruction, a fistula, or a pocket of infection (abscess).

How can you prevent diverticulitis?

You may be able to prevent diverticulitis if you drink plenty of water, get regular exercise, and eat a high-fiber diet. A high-fiber diet includes whole grains, fresh fruits, and vegetables.

Frequently Asked Questions

Learning about diverticular disease:

Being diagnosed:

Getting treatment:


 Go to top of page Go to top of pageGo to next section Go to next section

Author: Monica RhodesLast Updated: July 30, 2008
Medical Review: Kathleen Romito, MD - Family Medicine
Jerome B. Simon, MD, FRCPC, FACP - Gastroenterology

© 1995-2009 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
This information does not replace the advice of a doctor. Healthwise disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.

Click here to learn about Healthwise
Click here to learn about Healthwise
Topic Contents
Arrow PointerTopic Overview
 Cause
 Symptoms
 What Happens
 What Increases Your Risk
 When To Call a Doctor
 Exams and Tests
 Treatment Overview
 Prevention
 Home Treatment
 Medications
 Surgery
 Other Treatment
 Other Places To Get Help
 Related Information
 References
 Credits